1) We often speak English in the classroom. pres simple2) We rarely send them letters. pres simple3) When she was a student, she got to school by bus. past simp4) We could hardly recognise him. past simp5) My mother has bought me a beautiful dress. (pres perf ) 6) Do you speak English? - No, I don't. pres simple7) Were you at school yesterday? - Yes I was. past simp8) We will be taking (future cont) English lessons two times a week.9) I will do (future simp) it tomorrow if I have (pres simp) time.10) My sister is listening (pres cont) to the latest news on the radio.11) While my mother was cooking (past cont) dinner, I played (past simp) the piano.12) What will they be doing (future cont) tomorrow at three o'clock?13) I've never been to Paris. (pres perf ) 14) They had already translated (past perf) that article by 10 o'clock.15) Mr. Brown had been painting (past perf cont) the picture for a few days, when they came. (past simp) 16) Sam had been writing (past perf cont) a letter for an hour, when Flora came (past simp) yesterday.17) When you come (pres simp) back home at 4 o'clock, my mother will have been cooking (fut perf cont) dinner for an hour.